Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf01677fbc4344b2…

MALICIOUS

PDF

69.8 KB Created: 2021-09-15 06:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9940cce2937195a35f941f320f310fe0 SHA-1: 94148b58f993b40e037cb0461252ed329547d54b SHA-256: cf01677fbc4344b26e9563420f584007b8204dbb24aa2e9543992182602a6cbe
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning model assigned a high probability of maliciousness. Heuristics indicate the PDF acts as a link farm, directing users to numerous disposable domains, with one URL specifically containing 'utm_term=android+icon+emoji' suggesting a potential lure. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://irlanc.ru/uplcv?utm_term=android+icon+emoji PDF link annotation
    • https://grafconsulting.pl/Upload/file/wajidejoj.pdfIn PDF document text
    • https://ln80.cn/filespath/files/20210905121430.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614070fe93b8f---gejeduvinowuxewofilulipur.pdfIn PDF document text
    • https://qigoodteam.com/uploads/files/202109010106463929.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/nobatazum.pdfIn PDF document text
    • http://ingegneriarossi.it/userfiles/files/xufopajagadeluwetuwapake.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/jidelufaxogu.pdfIn PDF document text
    • https://securitydm.eu/slicice/file/58504214790.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/3650199036.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141564967484---73423512299.pdfIn PDF document text
    • https://dulsuc.cl/userfiles/file/39920756989.pdfIn PDF document text
    • http://filipdegreef.be/uploads/files/xevigovovejug.pdfIn PDF document text
    • http://charivne.info/images/file/12862952410.pdfIn PDF document text
    • https://njshore.drinkpoint.com/uploads/files/86072190444.pdfIn PDF document text
    • http://brlairport.com/images/file/19923365884.pdfIn PDF document text
    • https://giant-nano.com/app/webroot/userfiles/files/lubusibifirusitupojatop.pdfIn PDF document text
    • https://tinnituskozpont.hu/files/61173624696.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/falefigo.pdfIn PDF document text
    • http://dreesmann-foto.de/userfiles/file/45746583219.pdfIn PDF document text
    • https://thebottombillion.org/business_school/uploads/file/liziguxipajufuk.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/97071690219.pdfIn PDF document text
    • https://rolcsi-bau.hu/userfiles/files/natigovof.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/panegewuganakepuj.pdfIn PDF document text
    • http://polaryachtmanufactory.com/res/wysiwyg/file/lovogiwutij.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB635 14728 bytes
SHA-256: fef466945caddcdda2e819946861b3f1c72282e928e8d3d9adc90ecb24f2102b
font_01_sfnt_off0000dad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E9 10168 bytes
SHA-256: 3b254393853f65521d9afe2354b6e46f395a6c7cf10b97ac4b023290d6416d70

Open this report in the interactive analyzer, or submit your own file for analysis.